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(a) Simulated band structure of a detuned ) BSQW structure with unit cell parameters chosen to match those of quantum wells: , , the radiative damping rate, and . (b) Simulated group velocity of a BSQW structure at two detunings, (red, solid) and (blue, dashed). By varying the detuning , the group velocity of the pulse is continuously tunable (inset).
(a) Simulated reflection (black, solid) from, transmission (red, dashed) through, and absorption (blue, dotted) by an Bragg-spaced quantum well structure. (b) Low temperature measurements on the corresponding experimental structure. (c) Measured relative delay (black, square) and pulse broadening (blue, triangle) of a pulse, shown for reference in black/gray fill.
Measured temporally resolved , pulses transmitted through the experimental structure of Fig. 2(c). Pulses were centered on , , , and for the blue dash-dot line, the dark yellow dotted line, the red dashed line, and the black solid line, respectively. Delays are relative to the transmitted pulse at .
Simulation of a BSQW identical to Fig. 2 except with AR coatings on the front and exit interfaces designed for (a) and (b) , including reflection (black, solid), transmission (red, dashed), and absorption (blue, dotted). (c) Measurement of an experimental sample with target structure of (a), but actual structure closer to (b). The percentage error in AR coating layer thicknesses equals 1.5%. (d) Measured relative delay (black, square) and pulse broadening (blue, triangle) of a pulse, shown for reference in black/gray fill.
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